In a separate bowl, mix together blueberries and 1 tbsp of flour.
Gently toss the blueberries in the flour without crushing them, until all blueberries are coated.
In a medium bowl, mix together all-purpose flour, baking soda, and salt.
Whisk the dry ingredients with a whisk.
In a large bowl, combine melted and cooled butter and sugar.
Using a hand mixer, blend the butter and sugar on medium speed.
Add to the mixture heavy cream, eggs, vanilla extract, and lemon juice.
Whisk the wet ingredients together on medium speed until they are well combined.
Add lemon zest.
Mix again.
Add the flour mixture to the egg mixture.
On medium speed, combine the batter until it has a smooth consistency.
Add the blueberries to the cake batter.
Fold blueberries into the cake batter with a silicone spatula.
Bundt cake pan coating
Measure all ingredients for the pan coating.
Put on disposable gloves and thoroughly grease the bundt cake pan with vegetable shortening.
Coat the greased Bundt cake pan with all-purpose flour using a small hand sifter. Ensure that the entire pan is covered.
Flip the Bundt pan over and shake off any excess flour.
Check that the Bundt cake has a good flour coating. If not, blueberries may stick to the uncoated parts of the pan during baking, making it hard or impossible to remove the cake from the pan.
Pour the cake batter into the pan. Bake at 350°F for 60-70 minutes. Before removing the cake from the oven, check for doneness by inserting a toothpick in the middle of the cake.
Let the cake cool for 10 minutes in the pan before removing it.
Place a round cooling rack on top of the pan.
Flip the pan and cooling rack together.
Gently lift the pan to remove the cake. Cool the Bundt cake for at least 1 hour before garnishing.
Bundt cake garnish
Measure ingredients for dusting.
In a small bowl, mix powdered sugar and cornstarch together.
Whisk the ingredients until well combined.
Get a large serving plate or cake stand ready to transfer the bundt cake.
Using a cake lifter, carefully lift the bundt cake and slide it onto the serving plate.
Prepare a small hand sifter and the powdered sugar mixture for dusting.
Transfer the powdered sugar mixture to the sifter, then gently tap the side of the sifter to evenly cover the bundt cake with the mixture.